Actually, the mechanics are
important. My objective in this was to address the complaints that switch is just a chain of if-elses: that all the alternatives have to be searched until a match is found. I have implemented it as a dispatch table to eliminate searching. That precludes "smart matching", though. Only strict equivalence can be done this way (ok, anything's possible, but it's not reasonable).
For more of what you're looking for, I recommend my previous posting, (Revisiting) Smart match in p5. It looks a lot like your example, though I didn't turn it into an object, and I'm not sure there's any advantage to doing so. It will be another flavor to be included in the Case package.
Caution: Contents may have been coded under pressure.